Energy Efficiency in Wastewater Treatment...2018/10/29  · Energy Efficiency in Wastewater Treatment Energy Efficiency- Executive Workshop 28 th- 29 October 2018, Crown Plaza, Muscat

Energy Efficiency in Wastewater Treatment

Energy Efficiency- Executive Workshop

28th - 29th October 2018, Crown Plaza, Muscat

Younis Al-Rawahi

Design Engineer

Table of Contents

Introduction1

2 Nimr Water Treatment Plant

© BAUER NIMR LLC-

3 Yibal Sewage Treatment Plant

4 Future Vision

3

What is a Constructed Wetland?

An ecological engineered wetland system designed to harness natural process for the purpose of improving water quality

Characteristics:

• Low operating costs

• No or low-electricity requirement

• No chemical inputs

• High-level treatment performance

• Extremely robust and flexible operation

• Long life expectancy

• Provides wildlife habitat, recreation and reuse opportunities

5

The range of wetlands in Bauer Nimr

Table of Contents

© BAUER NIMR LLC-

Introduction1

2 Nimr Water Treatment Plant

3 Yibal Sewage Treatment Plant

4 Future Vision

Goal: To replace deep disposal wells with a reliable, environmentally-sound

alternative = gravity-flow, zero-discharge wetland system

Current capacity = 115,000 m3/d

Inlet TDS = 6000 ppm

Inlet Oil in Water = 350 ppm

7

The Nimr Water Treatment PlantDesigned, Built, Owned and Operated by BAUER

Nimr Water Treatment Plant Concept Design (Zero Liquid Discharge)

Turn-Over Point

•Metering skid

•Flow control valves

•Equalization basin

•Hydrocyclone

•Floating skimmers

Surface Flow Wetlands

•Treatment

•Evapotranspiration

Evaporation Ponds

•Zero-outflow

•Salt residue

Crude oil Water reuse

Produced

Water from

PDO

Nimr Water Treatment PlantAerial Overview of Wetland System for Produced Water

Turn-Over Point

Wetlands Evaporation Ponds

Buffer Pond

Nimr Water Treatment PlantSurface flow wetlands & Evaporation ponds

Suitable for large-scale applications

Can tolerate high flows and flow variability

Provides good habitat values

Biofilms covering oil

trapped on plant stems

Cyanobacteria mats

trap oil and degrade

hydrocarbons

Wetland Water QualityAverage Oil in Water concentration

Below detection limit (<

0.5 mg/L TPH)

© BAUER Resources GmbH, D-86529 Schrobenhausen

to this!

(Wetland outflow)From this…

(Wetland inflow)

Nimr Produced Water Treatment PlantIncreased Biodiversity and Habitat (> 120 Bird Species Observed)

Constructed Wetland System

vs Deep Disposal Well – Phase 1 and 2 Operation

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Performance Criterion Constructed Wetland

System

Deep Disposal Well

Land area requirement High Low

Operation and maintenance cost Low High

Electricity demand 0.06 kWh/m3 3.6-5.5 kWh/m3

Life expectancy of main components

(reinvestment interval)

25-30 years -

Need for professional technician to operate No Yes

Downtime due to e.g. failure, repair None To be expected

Climate change impact Positive

(acts as a carbon sink)

Negative

Aesthetic appeal High Low

Biodiversity enhancement Yes No

In-Country Value High Low

NWTP currently achieves a saving in electricity consumption of 400 –

625 Mwh per day by using the power of nature compare to Deep

Disposal Well

NWTP Phase 3Under construction

BAUER has been recently awarded with the contract to increase the

capacity of the existing facility by 60,000 m3/d with additional 130 ha of

Wetland

Further reduction in electricity consumption of 210 – 330 MWh per day

compared to deep disposal well

Table of Contents

© BAUER NIMR LLC-

Introduction1

2 Nimr Water Treatment Plant

3 Yibal Sewage Treatment Plant

4 Future Vision

Yibal Sewage Treatment Plant (350 m³/d)Area: 2,900 m²

Very stringent standard in Nitrogen (Standard A)

UV disinfection

First stage

Vertical Flow Constructed Wetland with

sludge mineralization

Second stage

Aerated Horizontal

Subsurface Flow

Constructed Wetland

Constructed Wetland System

vs Mechanical Package STP

19

Performance Criterion Constructed Wetland

System

Mechanical Package

STP

Land area requirement High Low

Capital cost Moderate Moderate

Operation and maintenance cost Low High

Electricity demand 0.05 kWh/m3 1.2-6.0 kWh/m3

Life expectancy of main components

(reinvestment interval)

25-30 years 6-10 years

Need for professional technician to operate No Yes

Ability to handle load fluctuations Good Poor

Sludge treatment included. No further handling

required.

Yes No

Mosquitos and bad odour No Potentially

Downtime due to e.g. failure, repair None To be expected

Climate change impact Positive

(acts as a carbon sink)

Negative

Aesthetic appeal High Low

Biodiversity enhancement Yes No

In-Country Value High Low

Table of Contents

© BAUER NIMR LLC-

Introduction1

2 Nimr Water Treatment Plant

3 Yibal Sewage Treatment Plant

4 Future Vision

Vision: Utilization of waste streams to generate power via a

renewable energy source to cover the energy needs of PDO

Nimr Camp and Offices

Reed

Biomass

Sewage

Sludge

Food

Waste

Pilot Biogas Plant electricity

biogas

digestate

Treatment/dewatering

Fertilizer / agriculture

Converter

Laboratory

analyses

NWTP Biogas Opportunity

Sustainable Bioenergy Research Consortium

(SBRC)

• BAUER Resource joined SBRC as a

Tier-1 partner

• SBRC is a non-profit entity established

by Masdar Institute of Science and

Technology in Abu Dhabi

• SBRC is backed from Etihad Airways,

The Boeing Company, Adnoc Refining,

Safran and General Electric

• Goal of the SBRC is to develop and

commercialize sustainable bio fuels for

the aviation industry

• Engineering Design, construction, and

operation of large-scale water

treatment facilities

The Seawater Energy and Agriculture SystemFood production, waste water treatment and production of sustainable

biomass for production of aviation fuels

Younis Al-RawahiE: [email protected]: +968 92626266

24

!شكراً لكم

Thank You!

Further information about BAUER’s capabilities & services, please visit:

www.bauerenvironment.comwww.bauer-water.com